开云体育

It should be listed in options somewhere on the menu screens or on a sticker on the back. The High Precision unit is a big plug in metal box about 10 cm square and 1 cm deep metal can along with several plug in units in a row ...RF etc boards.

I had units with high precision and regular oscillator. I swapped the high precision unit and I really did not notice any difference.?

You calibrate the oscillator from a menu function using an external?time base?I think the time base has to be several hundred MHz as I recall, I might be wrong about the freq of external time base. I use another HP unit with a GPS disciplined osc in it to cal the 8395 at 500 MHz.

I concluded that at the normal price of a high precision time base for this unit, an external?time base was much more accurate and cheaper. The actual oscillator in the high precision time base is not very big and I think it is a temp comp osc not an oven.